“smart lighting controls – cheshire school district case ......proposed performance contract...
TRANSCRIPT
LED Lighting & Network Lighting Controls Upgrade “Smart Lighting Controls – Cheshire School District Case Study”
Who We Are • Cheshire Public Schools
• Vincent Masciana – Director of Management Services
• Dan Marseglia – Manager of Building and Grounds
• Terry Snell – Building Maintainer Specialist
• Enlighted, Inc. • Michael Amato, CEM – Director of Sales Engineering and Utility Programs
• Mustone LED Illumination • John Mustone – Proprietor
Cheshire Public Schools • School District Overview
• 8 School Buildings built between 1912 and 1971 (+/-750,000 sq ft)
• Approximately 300 learning spaces (Classrooms, Labs, Libraries, etc.)
• Public Schools – typically not on the cutting-edge, especially if it costs $$$
• Brief History of Lighting Initiatives
• Upgraded Fluorescent Bulbs and Ballast in 2005
• 2011 - First LED Lighting Project – High School Auditorium
Cheshire High School Auditorium Project Summary:
60 incandescent fixtures using 250 watt bulbs each were replaced with 91 LED fixtures drawing just 14 watts each, a wattage reduction of 92% from 15,000 watts down to 1,274 watts with better much better overall lighting for the space!
The estimated energy savings for this project assuming 3,000 hours of use per year at $.16/kWh is $6,589 which represents a decrease from $7,200 per year down to just $612!
Cheshire Public Schools • School District Overview
• 8 School Buildings built between 1912 and 1971 (+/-750,000 sq ft)
• Approximately 300 learning spaces (Classrooms, Labs, Libraries, etc.)
• Public Schools – typically not on the cutting-edge, especially if it costs $$$
• Brief History of Lighting Initiatives
• Upgraded Fluorescent Bulbs and Ballast in 2005
• 2011 - First LED Lighting Project – High School Auditorium
• 2012 - High School Solar Energy Classroom – LED Lighting
• 2012 – Redwood Computer Controlled LEDs – Elementary 1st Grade Wing
Cheshire Public Schools • School District Overview
• 8 School Buildings built between 1912 and 1971 (+/-750,000 sq ft)
• Approximately 300 learning spaces (Classrooms, Labs, Libraries, etc.)
• Public Schools – typically not on the cutting-edge, especially if it costs $$$
• Brief History of Lighting Initiatives
• Upgraded Fluorescent Bulbs and Ballast in 2005
• 2011 - First LED Lighting Project – High School Auditorium
• 2012 - High School Solar Energy Classroom – LED Lighting
• 2012 – Redwood Computer Controlled LEDs – Elementary 1st Grade Wing
• 2013 – Enlighted Computer Controlled LEDs – Cheshire High School Library
• Projects possible due to energy savings, in-house labor, CL&P/Eversource incentives
• These initial projects turned out to be “proof-of concept”
Energy Performance Contract • 2010 – Town-wide Energy Performance Contract initiative begins
• 2011 – Ameresco selected, proposers included Con-Ed & Schneider Electric
• 2014 - Investment Grade Audit completed, 164 of 296 ECMs selected
Proposed Performance Contract Financials
Financing Term (after construction) 16 years
Estimated Tax-exempt Interest Rate 3.75%
Capital Cost $10,176,548
Estimated Rebates $1,203,682
Capital Contribution $0
Net Assumed Capital Cost $8,972,866
Guaranteed Cost Savings / Year 1 $663,269
Assumed Utility Escalation Rate 3.00%
Net Excess Cumulative Cash Flow $5,289
Energy Performance Contract • 2010 – Town-wide Energy Performance Contract initiative begins
• 2011 – Ameresco selected, proposers included Con-Ed & Schneider Electric
• 2014 - Investment Grade Audit completed, 164 of 296 ECMs selected
• The Great Lighting Debate of 2014 • Recommended Classroom Lighting ECM was Fluorescent Swap
• $522,195 Investment expected to result in annual energy savings of $56,114/year
• Based on prior experience school’s “suggested” LEDs were a better option • $3,149,875 investment expected to result in annual savings of $115,347/year…or more
• Ameresco’s team – had reservations about the schools expected energy savings from the Computer Controlled LED System installed in the high school library
• School’s team was skeptical abnout Ameresco’s assumption of fluorescents lasting 20,000 hours in the real world
• So Who won the Debate and Why???
Selected Energy Conservation Measures ECM Name Savings Simple Payback (years)Lighting System Improvements $79,474 6.24
Classroom Lighting - LED Option $115,347 24.33
Lighting Controls $243 9.74
Recommission and Upgrade
Controls $280,655 3.48
Building Weatherization $26,921 10.85
Electric Heat Conversion $39,663 75.7
Chiller Replacement $8,330 44.71
Oil to Gas Conversion $2,029 2.92
High Efficiency Boilers $11,476 24.77
Domestic Water Heating
Improvements $747 16.08
Replace Classroom TVs with
Atomic Clocks $21,667 1.36
Vending Machine Controls $3,362 1.77
Replace Refrigerators $1,424 5.62
Premium Efficiency Motors $849 9.96
Fan VFDs $4,909 15.28
Pump Improvement Measures $7,456 4.49
Kitchen Appliance Replacements $3,731 17.87
Premium Efficiency Transformers $5,834 14.59
Building Insulation $686 29.82
Piping Insulation $12,979 10.25
Water Conservation $16,168 12.93
GRAND TOTAL Guaranteed Year 1 Savings -
$663,269
Project Simple Payback –
13.86 yrs
Why Computer Controlled LEDs Works for Us • Annual Energy Savings of 80%+
• Base savings come from lower power consumption of LEDs
• Controls enhance savings by allowing for: • Across the board and selective dimming (extends 50,000 hour LED life further)
• “My new lights are too bright”
• Daylight harvesting (classrooms have lots of windows for natural light)
• Motion detection
• Scheduling capabilities
• Improved lighting with less outages…and a happier staff
• Maintenance Savings on Bulb & Ballast Replacement & Disposal Costs
• Employee Safety Improvements (reduces Worker’s Comp Claims)
Ladder Safety - Do’s and Don’t’s
Why Computer Controlled LEDs Works for Us • Annual Energy Savings of 80%+
• Base savings come from lower power consumption of LEDs
• Controls enhance savings by allowing for: • Across the board and selective dimming (extends 50,000 hour LED life further)
• “My new lights are too bright”
• Daylight harvesting (classrooms have lots of windows for natural light)
• Motion detection
• Scheduling capabilities
• Improved lighting…and customer service
• Maintenance Savings on Bulb & Ballast Replacement & Disposal Costs
• Employee Safety Improvements (reduces Worker’s Comp Claims)
• Maintenance staff empowerment and job enrichment
Screen Shot of CPS Lighting Controls Interface
Why Computer Controlled LEDs Works for Us • Annual Energy Savings of 80%+
• Base savings come from lower power consumption of LEDs • Controls enhance savings by allowing for:
• Across the board and selective dimming (extends 50,000 hour LED life further) • “My new lights are too bright”
• Daylight harvesting (classrooms have lots of windows for natural light) • Motion detection • Scheduling capabilities
• Improved lighting…and customer service
• Maintenance Savings on Bulb & Ballast Replacement & Disposal Costs
• Employee Safety Improvements (reduces Worker’s Comp Claims) • Cheshire High School Auditorium and Ladder Safety
• Maintenance staff empowerment and job enrichment
Bottom line – Computer-controlled LED solution simply made good sense
Evolution of Lighting Management
1st Generation Building=Zone
3rd Generation Sensor=Zone
2nd Generation Circuit=Zone
4th Generation Fixture=Zone
Other Retrofit Options
• Lights Controlled via Harness (Addressable) • Dimmable (Task but No Occupancy Tuning) • No User Preferences • *(Energy Savings 50-75%)
Standard Fixture Lighting with Digitally Addressable Harness (DAH)
Standard Fixture Lighting with DAH and Point to Point Control
• Lights Controlled via Harness (Addressable) • Typical Office and Meeting Room Controls • Localized Dimming (Occupancy Based) • *(Energy Savings 60-75%)
• Lights Controlled via Harness (Addressable) • Full Dimming Capability • Occupancy, Task, Daylight Harvesting • *(Energy Savings 50-90%)
Standard Fixture Lighting with Wired Sensor Control
*Presumption: LED Based Retrofit
Fine-Tuning = Maximum Savings Wireless Individually Addressable Fixture Lighting
AC LINE
MAXIMIZE ENERGY SAVINGS • Each Light Fixture Independently Controlled • Distributed Intelligence • Dimming 0% to 100% • Task Tuning • Daylight Harvesting • Metered Energy Consumption
= Maximum Energy Savings
Occupancy Control (Local and/or Remote)
Cloud (Remote)
Gateway
Energy Manager
SMART Sensor SMART Sensors = Data Driven/Future-Proof Buildings
Comfort & Convenience
• Smart Occupancy Detection
• Stability controlled daylight harvesting
• Time-of-Day dimming schedule
• Dim-and-Linger occupancy control
• Follow-me lighting effect
• Personalized settings / control
• Motion group sensors
• Space & Personnel Change Extensible
Microprocessor in each SMART Sensor delivers data visibility - 100 sq. ft.
Energy Savings • Task Tuning / High-end Trimming • Daylight Harvesting • Occupancy / Vacancy Detection • Automatic Demand Response /
Manual DR • Manual Override Controller • Occupancy Controlled Receptacles • BMS / BAS Integration • Energy Savings Report
Maintenance Benefits • Fixture Outage Reports • Longer Life of LEDs
• Save Money! Deferred Lighting Repairs/Replacements
• Safety! Less Ladder Time for Maintenance Staff
Technology Solution – How It Works? Simple, Advanced Energy Management
The Smart Sensor System is the simplest and most advanced way of managing a building’s physical environment. Together, Smart Sensors, Room Control, the Gateway, and the Energy Manager automate, analyze, control, and report environmental data to drive efficiency.
Smart Sensors: • Installed on a 1:1 Basis Per Fixture • 10’ x 10’ Area Coverage (Knowledge Worker) • Responds to Light, Motion and Heat • Collects Data and Sends Wirelessly to Gateway
Gateways • Conduit Between Smart Sensors and Energy Manager (EM) • Wirelessly gathers data from sensor back to EM • Sends Updates and Commands to Individual Sensors
Energy Manager • Stores Data & Performs Analytic Functions • Visual Reporting via Browser-Based Dashboard • Can Extend to 3rd Party Systems • Administration of Profiles & Settings
Data Solution • Web Based Dashboard Refreshed with Occupancy &
Energy Consumption Information • Samples Information Every 5 Seconds • Historical Data Per-Fixture
Tasking Tuning: 20 - 40% savings
Occupancy Sensing: 30 - 60% savings
Daylight Harvesting: 3 - 10% savings
Manual Override: Scene selection
Demand Response: DR and ADR functions
Controls Interface Profiles Make Difficult Control Strategies Easy to Implement
User Interface Sensors Mapped to Floor Plan Creates a Simple User Interface
• User Friendly, means that people will use it
• Meaningful Data, empowers the facility staff creating system operators out of each member of your crew
Dense Data, Infinite Applications Limitless Applications Beyond Lighting Possible
• Richest, Best Data-Set, Ever Collected
• Enables deeply Granular Decision Making
• It all Begins with Lighting (the 1st App.)
Extensible – HVAC Advisor Application HVAC Applications
Fault Detection - Temperature heat maps of hot and cold spots can detect simultaneous heating and cooling of the building and insulation leaks
5:00pm 6:20pm- Overlay 6:00pm- cold spots 6:20pm- hot spots
Demand Based Occupancy Controls – integrating sensor’s real time occupancy information with the buildings BMS to actively adjust set back zones
Benefits to Facility Manager: Helps save >25% building HVAC energy cost by utilizing current and historical occupancy data
Extensible – Space Utilization Suite Real Estate Applications
Benefits to Real Estate Team: • Help Better Understand Space Utilization by Zone
Over Time • How People Move About the Space • Actionable:
• Space Design Change to Increase Productivity • Need for Additional Zone of Specific Type • Need for Creating Common/Emergency Facilities
in Motion Path
Energy Savings – Fluorescent Baseline LED + Network Lighting Controls Creates Maximum Savings Potential
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Baseline Report
Baseline
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Energy Savings – LED LED + Network Lighting Controls Creates Maximum Savings Potential
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Energy Savings Report
Baseline LED Savings
53.5% Savings
Consumption
Energy Savings – LED + Controls LED + Network Lighting Controls Creates Maximum Savings Potential
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Energy Savings Report
Baseline Task Tuning Savings LED Savings
69.5% Savings
Consumption
Energy Savings – LED + Controls LED + Network Lighting Controls Creates Maximum Savings Potential
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Energy Savings Report
Baseline Ambient Savings Task Tuning Savings LED Savings
70.6% Savings
Consumption
Energy Savings – LED + Controls LED + Network Lighting Controls Creates Maximum Savings Potential
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Energy Savings Report
Baseline Occupancy Savings Ambient Savings Task Tuning Savings LED Savings
82.3% Savings
Network Lighting Controls Put the Light Where You Need It, When You Need It!
Consumption
Savings Analysis Based on Measured Data from the Cheshire School District Energy Managers
Previous Total Fluor. System 386.9 kW 0.56 W/sq.ft. Current Total LED System 175.0kW 0.25 W/sq.ft.
Number of Schools 6 Square Footage 689,000 One School Omitted from Data Set
Measured Data for Typical Week of Lighting Energy All Values in kWh Baseline Consumed LED Savings Controls Savings Total Savings % Savings Sunday 172.1 73.0 59.3 39.8 99.1 57.6% Monday 3712.2 669.2 1994.0 1049.1 3043.0 82.0% Tuesday 4242.1 751.5 2285.4 1205.1 3490.5 82.3% Wednesday 4251.5 736.2 2288.7 1226.6 3515.3 82.7% Thursday 4218.5 725.5 2267.9 1225.1 3493.0 82.8% Friday 4605.4 782.8 2479.4 1343.2 3822.6 83.0% Saturday 502.8 105.5 230.5 166.8 397.3 79.0% Weekly TOTAL 21,704.6 3,843.7 11,605.1 6,255.8 17,860.9 82.3% School Year TOTAL 759,661.4 134,531.1 406,177.6 218,952.7 625,130.3
School Year Extrapolated at Net 35 Weeks 17.7% 53.5% 28.8% 82.3%
Baseline After LED 353,483.8
Controls Savings 218,952.7 61.9%
Scalable Values, kWh/sq.ft. Baseline Consumed LED Savings Controls Savings Total Savings School Year TOTAL 1.10 0.20 0.59 0.32 0.91 52 Week Year TOTAL 1.64 0.29 0.88 0.47 1.35
Estimated Project Economics Material, Labor, Incentives, Savings
Material and Labor • $3,006,451 cost for lighting upgrades included in Energy Performance Contract • Material Costs have dropped 30% since then
Eversource Incentive • $291,232 from Eversource for lighting upgrades (of the $1,251,851 total paid for the overall EPC)
Savings on 625,130 kWh @ $0.18 per kWh • $112,523 per 35 week school year
• $39,412 is from Controls
Simple Payback – Energy Savings plus Incentive Only • Approximately 24.1 Years
Eversource has independently evaluated the energy savings and estimates the savings to be approximately 50% greater than the conservative evaluation presented here today when taking into account additional off-hours and non-academic calendar savings.
Michael Amato, CEM – Director, Sales Engineering & Utility Programs 347-762-6286 [email protected] www.enlightedinc.com
Contact Information
Vincent Masciana – Director of Management Services [email protected] Dan Marseglia – Manager of Building and Grounds [email protected]